 | Edwin Pliny Seaver, George Augustus Walton - Arithmetic - 1895 - 438 pages
...hexagon ? octagon ? decagon ? Thus learn that, in general, Tfie sum of the angles of any polygon ts equal to twice as many right angles as the polygon has sides less two sides. j. If all the angles of a pentagon (hexagon, octagon, decagon, dodecagon) are equal,... | |
 | Joe Garner Estill - Geometry - 1896 - 168 pages
...a triangle is greater than the difference of the other two. 4. The sum of the angles of any polygon is equal to twice as many right angles as the polygon has sides, less four right angles. 5. The areas of similar triangles are to each other as the squares of their... | |
 | Joe Garner Estill - 1896 - 186 pages
...a triangle is greater than the difference of the other two. 4. The sum of the angles of any polygon is equal to twice as many right angles as the polygon has sides, less four right angles. 5. The areas of similar triangles are to each other as the squares of their... | |
 | Webster Wells - Geometry - 1898 - 264 pages
...of the A of any A is equal to two rt. AJ (§ 84) 127. Cor. I. TJie sum of the angles of any polygon is equal to twice as many right angles as the polygon has sides, less four right angles. "For if R represents a rt. Z., and n the number of sides of a polygon, the... | |
 | Webster Wells - Geometry - 1899 - 450 pages
...the sum of the A of the polygon is n — 2 times 127. Cor. I. The sum of the angles of any polygon is equal to twice as many right angles as the polygon has sides, less four right angles. For if R represents a rt. Z, and n the number of sides of a polygon, the sum... | |
 | Webster Wells - Geometry - 1899 - 424 pages
...of the A of any A is equal to two rt. A] (§ 84) 127. Cor. I. The sum of the angles of any polygon is equal to twice as many right angles as the polygon has sides, less four right angles. For if R represents a rt. Z, and n the number of sides of a polygon, the sum... | |
 | William James Milne - Geometry - 1899 - 398 pages
...of sides. To prove ABCDE and FGHJK similar. Proof. By § 166, the sum of the angles of each polygon is equal to twice as many right angles as the polygon has sides less two. Since, § 374, each polygon is equiangular, and since each contains the same number of angles... | |
 | William James Milne - Geometry, Modern - 1899 - 258 pages
...of sides. To prove ABCDE and FGHJK similar. Proof. By § 166, the sum of the angles of each polygon is equal to twice as many right angles as the polygon has sides less two. Since, § 374, each polygon is equiangular, and since each contains the same number of angles... | |
 | William James Milne - Geometry - 1899 - 404 pages
...polygon of any number (n) of sides, as ABCDE. Ef To prove the sum of the angles, A, B, C, D, and E equal to twice as many right angles as the polygon has sides less two. Proof. From any vertex, as J,draw the diagonals, JCand AD. The number of triangles thus formed... | |
 | International Correspondence Schools - Mining engineering - 1900 - 728 pages
...regular polygon. If not, it is an irregular polygon. The sum of the interior angles of any polygon is equal to twice as many right angles as the polygon has sides, less four right angles. To Find the Area of Any Regular Polygon.— Square one of its sides and multiply... | |
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Hence, the interior angles plus four right angles, is equal to twice as many right angles as the polygon... 
